Rodriguez double & Matip OG after Firmino opener
Craig Pawson reviews tug on Salah in box and gives penalty, missed by Firmino
Salah narrows deficit late in second half
In-play clips available to UK users, commentary on Radio 5 live and online
#bbcfacup or 81111 on text
Rob Allpress: What's going on? I go out to the kitchen to wash up one plate, and miss two goals...
Andrew Ogley: Can't Liverpool just play Man City again...
Liverpool 1-2 West Brom
Pat Nevin
Ex-Chelsea winger on BBC Radio 5 live at Anfield
I'm beginning to wonder if I'm watching the right game here. Because if Man City had scored this goal - we'd have been salivating. Jay Rodriguez is finding all sorts of space in between the lines - right where Emre Can should be - Can is at fault for that goal.
Jay Rodriguez
Two goals in four minutes!
This one was much less spectacular though. A ball is fired across the box and Rodriguez gets on the end of it - leaving Mignolet no chance from three yards out.
#bbcfacup or 81111 on text
ARahman: Catastrophic defending. Terrific finish from Firmino. Soft defending. Rodriguez with a stunning finish. Yes ,we are watching a Liverpool game again.
Jay: Liverpool sure know how to entertain neutrals.
Liverpool 1-1 West Brom
Firmino plays in Salah on the right.
The Egyptian is in space and he has time to lift his head up and pick out Mane - who had made a great run into the box.
It's slightly behind him and Mane can't quite reach it.
Liverpool 1-1 West Brom
Pat Nevin
Ex-Chelsea winger on BBC Radio 5 live at Anfield
I thought Jonny Evans had gone to sleep - the whole Liverpool defence has gone to sleep there! It was a bright start to the game - but what about this! Jay Rodriguez has absolutely leathered that into the top corner.
Jay Rodriguez
What a strike!
Rodriguez is given far too much space and he drives through the middle, out-pacing the Liverpool defence and fires an unstoppable strike past Simon Mignolet.
Talk about a quick start...
Roberto Firmino
It's a mistake from Jonny Evans.
The West Brom centre-back leaves the ball for Ben Foster but Mo Salah is quick to chase it down.
Foster panics and Firmino picks up the rebound, chipping it into the empty net.
Liverpool 0-0 West Brom
Liverpool enjoying some early possession but West Brom look nice and compact at the back.
Salah and Mane have both been stopped in their tracks so far.
Liverpool 0-0 West Brom
Georginio Wijnaldum drives forward from midfield and lays it off to Roberto Firmino on the edge of the box.
The Brazilian's shot is blocked and from the rebound Sadio Mane has another attempt - but that's blocked too!
Liverpool 0-0 West Brom
And we're off.
It's the fourth round of the FA Cup under the lights at Anfield.
#bbcfacup or 81111 on text
Hanan Jeddy: Strong line up from Klopp. Looks like he's finally taking the FA Cup seriously.
They just couldn't hold on but what a performance from Newport.
They have booked themselves a replay at Wembley!
"You'll never walk alone" is ringing out at Anfield.
The players are out, the ball is in the centre circle.
We're almost underway...
Liverpool v West Brom (19.45 GMT)
Image source, PALiverpool v West Brom (19:45 GMT)
Only PSG and Manchester City have longer current unbeaten runs at home than Liverpool in Europe's top five leagues.
Liverpool v West Brom (19:45 GMT)
Image source, Getty ImagesWest Brom manager Alan Pardew: "We take less pressure into this game. It's a cup game with no league points on offer.
"The pressure is off us so maybe we can open up our game a little bit which is what I've been trying to encourage since I have been here.
"We will go to Liverpool and try and cause them problems."
Liverpool v West Brom (19:45 GMT)
Mark Lawrenson
BBC football expert on BBC Radio 5 live
"As I have said before, I think the FA Cup is important to Liverpool this season - or at least it should be.
"In contrast, I would not have thought that West Brom boss Alan Pardew will mind too much if his side go out of the FA Cup, because his brief was to keep the Baggies in the top flight."
Lawro's prediction: 2-0
Lawro was up against Copa90 presenters Poet and Vuj. You can find all of their predictions for this weekend's FA Cup here.
Liverpool v West Brom (19:45 GMT)